I am building a custom shower in bathroom that I've recently gutted. I have not put of backer board yet, so I have full access to do whatever I need. My plan is to run a rain shower head from the ceiling and have a handheld mounted on the wall. I want to use only one at a time; I won't have any reason to run both simultaneously. My issue right now is that I don't completely understand what parts I need to accomplish this. Can I purchase a shower set and a handheld separately? Then I also need a 2 way diverter? I hope my question is clear.

It's down to the studs right now. I haven't even laid the first mortar bed yet. The plumbing has been run to where I'll install the valve, so I plan to go to the ceiling from there. I also need to run a line to the handheld.

It's down to the studs right now. I haven't even laid the first mortar bed yet. The plumbing has been run to where I'll install the valve, so I plan to go to the ceiling from there. I also need to run a line to the handheld.

This is in a finished attic space. I really just need to know the name/specs of the two valves I need in order to rough in the plumbing. I'm looking at a Price Pfister set, so I suppose I'll need Price Pfister valves, if that's what I'll be using.

These are the two I'm thinking I need (I realize this is a 3 way and not a 2 way, which is fine):

Have you seen the other post about geen drywall, aparently it is not rated for ceilings unless the joists are 12" on center? The internet seems to agree>

Interesting. Is the green board not as strong? This is a 100 year old house, so the rafters aren't even 16" on center. There's not much I can do to add extra support between them without pulling out some of the spray foam, which I'd rather not do. I suppose I may have to in order to hang backer board in the shower area.